So, yeah I am explicitly saying that the price ceiling and the demand for the burger aren't as neatly related as it looks, because the substitutes for this particular burger are going to be very close to it in quality (it's possible that for something close to 50% of patrons, this burger will be perceived as "worse" than other cheap burgers they've had, because opinions vary).
If this was that Raoul's burger, where it's ground short rib and brisket with a triple cream brie and a cognac cream dipping sauce, I'd be right there with you. But Stanich is apparently just a cheap diner burger very well executed (in Alexander's estimation, but I have no reason to doubt him). If you charge $30 for that, people will pay (once), and then feel ripped off. For a little while. Then word will get out.
It probably is the best cheap diner burger in America! The dude did the research! I'm just saying, you probably can't charge $30 for a cheap burger, sustainably. You'll do OK in the short term, and then irreversibly harm the business.
Scaling out makes a lot more sense. He probably should franchise.